This directory contains the patch file needed to update the development version psdoom-2000.05.03.a to the latest development snapshot, psdoom-2000.05.03.b To apply the patch, copy the file 'psdoom-2000.05.03.b-patch' to the top-level directory of psDooM. The listing of that directory should look similar to this after the copy: -rw-r--r-- 1 root root 9247 Mar 14 01:08 README -rw-r--r-- 1 root root 32574 Jun 14 01:07 psdoom-2000.05.03.b-patch drwxr-xr-x 2 root root 1024 Mar 28 22:35 psdoomdoc/ drwxr-xr-x 2 root root 1024 Mar 14 01:08 xdlaunch/ drwxr-xr-x 9 root root 1024 Mar 14 01:08 xdoomsrc/ Change directory to that directory and run the following command: patch -p1 < psdoom-2000.05.03.b-patch Once you apply the patch, build psDooM as you would build regular XDoom. See the XDoom INSTALL file in xdoomsrc/doc/ for instructions. Be sure to read the documentation in 'psdoomdoc/' and 'xdoomsrc/doc/'.